CeO2 materials doped with the di- or tri-valent metals possess high oxide ionic conductivity at low temperature for potential electrolyte use in intermediate temperature solid oxide fuel cell (SOFC). However, multi-elements doped CeO2-based electrolyte, (La1-x-ySrxBay)0.175Ce0.825O2-δ (LSBC) in this work, with pure phase is difficultly synthesized at low calcination temperature. High sintering temperature, e.g. > 1500°C, is also needed in conventional mixed oxide method. In this work, nanoparticles less than 50nm of LSBC can be prepared by solution-evaporation method at constant temperature. Pure fluorite crystal structure can be obtained lower than 700°C. The optimal mole ratio of LSBC/citric acid in prepared solution is 1/2 to achieve homogeneous composition and pure phase of LSBC. Small grain size of about 1μm average is observed for 1300°C-microwave sintered LSBC by solution-evaporation method. The ionic conductivity of 1400°C-conventional sintered and 1300°C-microwave sintered LSBC prepared by solution-evaporation method is about 0.006 S/cm at 600°C but less than 0.004 S/cm at 600°C even for 1500°C-conventional sintered LSBC prepared by mixed oxide method.
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ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology
June 8–10, 2009
Newport Beach, California, USA
Conference Sponsors:
- Advanced Energy Systems Division
ISBN:
978-0-7918-4881-4
PROCEEDINGS PAPER
Low-Temperature Prepared Multi-Elements Doped CeO2 Electrolyte
Horng-Yi Chang,
Horng-Yi Chang
National Taiwan Ocean University, Keelung, Taiwan
Search for other works by this author on:
Yao-Ming Wang
Yao-Ming Wang
National Taiwan Ocean University, Keelung, Taiwan
Search for other works by this author on:
Horng-Yi Chang
National Taiwan Ocean University, Keelung, Taiwan
Yao-Ming Wang
National Taiwan Ocean University, Keelung, Taiwan
Paper No:
FuelCell2009-85221, pp. 767-771; 5 pages
Published Online:
February 17, 2010
Citation
Chang, H, & Wang, Y. "Low-Temperature Prepared Multi-Elements Doped CeO2 Electrolyte." Proceedings of the ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology. ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology. Newport Beach, California, USA. June 8–10, 2009. pp. 767-771. ASME. https://doi.org/10.1115/FuelCell2009-85221
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